I think at this point you should be more worried about being thrown in a detention centre. But the likelihood of being affected gun violence in be US especially if you stick to the right parts is low as long as you're there for a short while.
3,000 out of 66,500,000 visitors per year means you have a 0.004% chance of having this happen to you. You have significantly more chances of dying on your way to work in whatever country you are at.